Help with IF command

Occasional Contributor

In the rows I have many many observations

In the columns I have variables X & Y.

X takes values 1-5000, and Y is some price.

I want to create a 3rd column which takes values:

1 if the price is in the top 5% of prices for whatever X value that row has.

0 otherwise

E.g. if the row is X=1, Y=9999, I want the 3rd cell to be =1 if out of all rows with X=1, 9999 is in the top 15% of Y's in those rows.


Hope that makes sense.

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